SOLUTION: 11. Multiply. (5p + 4)(5p - 4)

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Question 461102: 11. Multiply.
(5p + 4)(5p - 4)

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Use FOIL.

(5p + 4)(5p - 4) = 25p^2 - 20p + 20p - 16

= 25p^2 - 16

Or we can note that this resembles the difference of two squares form, and we can come up to the answer right away without multiplying it out.